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%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2008-2010. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%%
%% %CopyrightEnd%
%%
%% Some utilities

-module(gen_util).
-compile(export_all).

lowercase([F|R]) when F >= $A, F =< $Z ->   [F+($a-$A)|R];
lowercase(Str) when is_list(Str) ->   Str.

lowercase_all([F|R]) when F >= $A, F =< $Z -> [F+($a-$A)|lowercase_all(R)];
lowercase_all([F|R])  ->               [F|lowercase_all(R)];
lowercase_all([]) ->                   [].

uppercase([F|R]) when F >= $a, F =< $z ->    [F+($A-$a)|R];
uppercase(Str) when is_list(Str) ->   Str.

uppercase_all([F|R]) when F >= $a, F =< $z -> [F+($A-$a)|uppercase_all(R)];
uppercase_all([A|R]) ->             [A|uppercase_all(R)];
uppercase_all([]) ->                [].


strip_name([H|R1],[H|R2]) ->
    strip_name(R1,R2);
strip_name(String,[]) -> String.

open_write(File) ->
    %% io:format("Generating ~s~n",[File]),
    {ok, Fd} = file:open(File++".temp", [write]),
    put(current_file, {Fd,File}).
    

close() ->
    case get(current_file) of
	undefined -> 
	    ok;
	{closed, File} ->
	    io:format("Closing twice ~s~n",[File]);
	{Fd,File} ->
	    file:close(Fd),
	    case os:cmd("diff " ++ File ++ " " ++ File ++ ".temp" ++ "| head -30") of
		[] -> 
		    ok = file:delete(File ++ ".temp"),
		    %% So that make understands that we have made this
		    %% case os:getenv("CLEARCASE_ROOT") of
		    %% 	false -> os:cmd("touch " ++ File);
		    %% 	_ ->  ignore
		    %% end,
		    ok;
		Diff ->
		    case check_diff(Diff) of
			copyright -> %% We ignore copyright changes only
			    ok = file:delete(File ++ ".temp");
			_ ->		    
			    io:format("Diff in ~s~n~s ~n", [File, Diff]),
			    case file:rename(File ++ ".temp", File) of
				ok -> ok;
				_ -> 
				    io:format("*****  Failed to save file ~p ~n",[File])
			    end
		    end
	    end,
	    put(current_file, {closed, File})
    end.


check_diff(Diff) ->
    try 
	[_,D1,_,D2|Tail] = re:split(Diff, "\n"),
	case Tail of 
	    [] -> ok;
	    [<<>>] -> ok;
	    _ -> throw(diff)
	end,
	<<_, _, "%% Copyright", _/binary>> = D1,
	<<_, _, "%% Copyright", _/binary>> = D2,
	copyright
    catch
	throw:_ ->  diff;
	error:{badmatch,_} ->
	    diff;
	_:What ->
	    io:format("~p:~p: ~p ~p~n", [?MODULE,?LINE, What, erlang:get_stacktrace()]),
	    diff
    end.

w(Str) ->
    w(Str, []).
w(Str,Args) ->
    {Fd,_} = get(current_file),
    io:format(Fd, Str, Args).

args(Fun, Limit, List) ->
    args(Fun, Limit, List, infinity, 0).

args(Fun, Limit, List, Max) ->
    args(Fun, Limit, List, Max, 0).

args(_Fun, _Limit, [], _Max, _) -> "";  %% No args
args(Fun, _Limit, [Last], _Max, _Pos) -> 
    case Fun(Last) of 
	skip -> ""; %% FIXME bug if last skips
	Str  -> Str
    end;
args(Fun, Limit, [H|R], Max, Pos) ->
    case Fun(H) of 
	skip -> args(Fun,Limit,R, Max, Pos);
	Str  -> 
	    {NL, NewPos} = 
		case length(Str) + Pos of
		    Curr when Curr > Max ->
			{"\n  ", 0};
		    Curr -> 
			{"", Curr}
		end,
	    case args(Fun,Limit,R, Max, NewPos) of 
		"" -> Str;
		End -> Str ++ Limit ++ NL ++ End
	    end
    end.

    


tokens(S) ->
    tokens1(S, " \t\r\n(){}*;,@", []).
tokens(S,Seps) ->
    tokens1(S, Seps, []).

tokens1([C|S], Seps, Toks) ->
    case lists:member(C, Seps) of
        true -> tokens1(S, Seps, [C|Toks]);
        false -> tokens2(S, Seps, Toks, [C])
    end;
tokens1([], _Seps, Toks) ->
    replace_and_remove(Toks, []).

tokens2([C|S], Seps, Toks, Cs) ->
    case lists:member(C, Seps) of
        true -> tokens1(S, Seps, [C, lists:reverse(Cs) |Toks]);
        false -> tokens2(S, Seps, Toks, [C|Cs])
    end;
tokens2([], _Seps, Toks, Cs) ->
    replace_and_remove([lists:reverse(Cs)|Toks], []).

replace_and_remove([E|R], Acc) when is_list(E) -> %% Keep everything that is a word
    replace_and_remove(R, [E|Acc]);
replace_and_remove([$\n | R], Acc) ->   %% It is semi line oriented so keep eol
    replace_and_remove(R, [eol|Acc]);
replace_and_remove([$( | R], Acc) ->    
    replace_and_remove(R, ["("|Acc]);
replace_and_remove([$) | R], Acc) ->
    replace_and_remove(R, [")"|Acc]);
replace_and_remove([${ | R], Acc) ->    
    replace_and_remove(R, ["{"|Acc]);
replace_and_remove([$} | R], Acc) ->
    replace_and_remove(R, ["}"|Acc]);
replace_and_remove([$| | R], Acc) ->
    replace_and_remove(R, ["|"|Acc]);
replace_and_remove([$* | R], Acc) ->
    replace_and_remove(R, ["*"|Acc]);
replace_and_remove([$& | R], Acc) ->
    replace_and_remove(R, [$&|Acc]);
replace_and_remove([$<,$< | R], Acc) ->
    replace_and_remove(R, ["<<"|Acc]);
replace_and_remove([$, | R], Acc) ->
    replace_and_remove(R, [cont|Acc]);
replace_and_remove([$; | R], Acc) ->
    replace_and_remove(R, [eoe|Acc]);
replace_and_remove([$@ | R], Acc) ->    
    replace_and_remove(R, [directive|Acc]);

replace_and_remove([_E|R], Acc) ->       %% Ignore everthing else
    replace_and_remove(R, Acc);
replace_and_remove([], Acc) ->
    Acc.

halt(Reason) ->
    case process_info(group_leader(), status) of
	{_,waiting} ->
	    %% Now all output data is down in the driver.
	    %% Give the driver some extra time before halting.
	    receive after 10 -> ok end,
	    erlang:halt(Reason);
	_ ->
	    %% Probably still processing I/O requests.
	    receive after 20 -> ok end,
	    gen_util:halt(Reason)
    end.

erl_copyright() ->
    StartYear = start_year(get(current_class)),
    w("%%~n",[]),
    w("%% %CopyrightBegin%~n",[]),
    w("%%~n",[]),
    w("%% Copyright Ericsson AB ~p-2010. All Rights Reserved.~n",
      [StartYear]),
    w("%%~n",[]),
    w("%% The contents of this file are subject to the Erlang Public License,~n",[]),
    w("%% Version 1.1, (the \"License\"); you may not use this file except in~n",[]),
    w("%% compliance with the License. You should have received a copy of the~n",[]),
    w("%% Erlang Public License along with this software. If not, it can be~n",[]),
    w("%% retrieved online at http://www.erlang.org/.~n",[]),
    w("%%~n",[]),
    w("%% Software distributed under the License is distributed on an \"AS IS\"~n",[]),
    w("%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See~n",[]),
    w("%% the License for the specific language governing rights and limitations~n",[]),
    w("%% under the License.~n",[]),
    w("%%~n",[]),
    w("%% %CopyrightEnd%~n",[]).

c_copyright() -> 
    w("/*~n",[]),
    w(" * %CopyrightBegin%~n",[]),
    w(" *~n",[]),
    w(" * Copyright Ericsson AB 2008-2010. All Rights Reserved.~n",[]),
    w(" *~n",[]),
    w(" * The contents of this file are subject to the Erlang Public License,~n",[]),
    w(" * Version 1.1, (the \"License\"); you may not use this file except in~n",[]),
    w(" * compliance with the License. You should have received a copy of the~n",[]),
    w(" * Erlang Public License along with this software. If not, it can be~n",[]),
    w(" * retrieved online at http://www.erlang.org/.~n",[]),
    w(" *~n",[]),
    w(" * Software distributed under the License is distributed on an \"AS IS\"~n",[]),
    w(" * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See~n",[]),
    w(" * the License for the specific language governing rights and limitations~n",[]),
    w(" * under the License.~n",[]),
    w(" *~n",[]),
    w(" * %CopyrightEnd% ~n",[]),
    w("*/~n",[]).

start_year("wxAuiManagerEvent") -> 2009;
start_year("wxAuiNotebookEvent") -> 2009;
start_year("wxChoicebook") -> 2009;
start_year("wxGridCellBoolEditor") -> 2009;
start_year("wxGridCellBoolRenderer") -> 2009;
start_year("wxGridCellChoiceEditor") -> 2009;
start_year("wxGridCellFloatEditor") -> 2009;
start_year("wxGridCellFloatRenderer") -> 2009;
start_year("wxGridCellNumberEditor") -> 2009;
start_year("wxGridCellNumberRenderer") -> 2009;
start_year("wxGridCellStringRenderer") -> 2009;
start_year("wxGridCellTextEditor") -> 2009;
start_year("wxHtmlLinkEvent") -> 2009;
start_year("wxHtmlWindow") -> 2009;
start_year("wxListbook") -> 2009;
start_year("wxLogNull") -> 2009;
start_year("wxSpinEvent") -> 2009;
start_year("wxSplitterEvent") -> 2009;
start_year("wxSplitterWindow") -> 2009;
start_year("wxToolbook") -> 2009;
start_year("wxTreebook") -> 2009;
start_year(_) -> 2008.